package com.hxzy.config;

import com.hxzy.common.filter.RepeatableFilter;
import com.hxzy.interceptor.impl.UrlDataRepeatSubmitImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;


/**
 * springmvc的前端控制器配置文件，以前的 <servlet-name>-servlet.xml，现在使用注解方式
 */
@Configuration
public class ShopMvcConfig  implements WebMvcConfigurer {

    /**
     * 后台要放行的url地址
     */
    @Value(value = "${token.admin.exclude}")
    private String[] adminExcludeMapping;


    /**
     * 跨域配置
     */
    @Bean
    public CorsFilter corsFilter() {
        CorsConfiguration config = new CorsConfiguration();
        config.setAllowCredentials(true);
        // 设置访问源地址
        config.addAllowedOriginPattern("*");
        // 设置访问源请求头
        config.addAllowedHeader("*");
        // 设置访问源请求方法
        config.addAllowedMethod("*");
        // 有效期 1800秒
        config.setMaxAge(1800L);

        // 添加映射路径，拦截一切请求
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", config);
        // 返回新的CorsFilter
        return new CorsFilter(source);
    }


    /**
     * 自定义重复提交的filter,对请求流进行包装,形成可重复读取的流
     *
     * @return
     */
    @SuppressWarnings({"rawtypes", "unchecked"})
    @Bean
    public FilterRegistrationBean someFilterRegistration() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(new RepeatableFilter());
        registration.addUrlPatterns("/*");
        registration.setName("repeatableFilter");
        registration.setOrder(FilterRegistrationBean.LOWEST_PRECEDENCE);
        return registration;
    }

    @Autowired
    private UrlDataRepeatSubmitImpl urlDataRepeatSubmit;

    /**
     * 自定义拦截规则
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // 对所有的请求，对控制器进行判断，是否需要数据提交的验证
        registry.addInterceptor(urlDataRepeatSubmit).addPathPatterns("/**");
    }

    /**
     * 静态资源放行
     *
     * @param registry
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/**").addResourceLocations("classpath:/static/");

        registry.addResourceHandler("swagger-ui.html")
                .addResourceLocations("classpath:/META-INF/resources/");

        registry.addResourceHandler("doc.html").addResourceLocations("classpath:/META-INF/resources/");


        registry.addResourceHandler("/webjars/**")
                .addResourceLocations("classpath:/META-INF/resources/webjars/");
    }

}
